Cristina
Fire 
Middle row 
Wizard Tier 1 Meteor Strike
Damage Dealt: Inflict damage equal to 1136% of Attack.
Target: All Enemies
Effect 1: Burn
Damage Over Time: Receive Caster's Attack 200% damage every 1 Second(s).
Effect 2: Apply Debuff
Critical Resistance Reduction +10%.
Fireball
Damage Dealt: Inflict damage equal to 540% of Attack.
Target: All Enemies
Effect 1: Burn
Damage Over Time: Receive Caster's Attack 100% damage every 1 Second(s).
Effect 2: Apply Debuff
Critical Resistance Reduction +6%.
Command
Effect 1: Apply Team Buff
Target: Ally
Attack +52%.
Effect 2: Apply Team Buff
Target: Ally
Damage Reduction +10%.
Arson
Effect 1: Apply Team Buff
Target: Ally
Root Resistance +50%.
Effect 2: Apply Buff
Target: All Allies Fire Attribute
Status Effect Bonus Damage (Burn): Inflict 24% additional damage to targets with Burn.
Effect 3: Apply Buff
Detailed Activation Condition: Activates if any Enemy has 1 or More 「Meteor Strike」 buff(s) cast by Self
Target: All Allies
Additional Damage Received: Receive -12% additional damage when receiving damage.
Effect 4: Apply Buff
Detailed Activation Condition: Activates if any Enemy has 1 or More 「Fireball」 buff(s) cast by Self
Target: All Allies
Additional Damage Received: Receive -12% additional damage when receiving damage.
Character sizes
Recommended stats
About Ignore Damage Reduction %
This stat only works if the boss has passive skills giving him damage reduction. If not, it's useless.
Avalon, Reincarnation of Stars and Raids usually all have this passive, but always double check to make sure.
Recommended cards
Cards will always change depending on the stage and content you are currently facing, this is just a couple of examples on what cards work for this character.
Water Dragon's Blessing (Merlin)
Magic Attack +60%
Magic Critical Strike Chance +10%
Madness (Vivien)
Magic Attack +60%
Magic Critical Strike Chance +10%
Queen's Temptation (Morgan le Fay)
Magic Attack +60%
Critical Hit Chance +10%
Rose Flame (Cristina)
Magic Attack +60%
Attack Speed +10%